The root of qadar is qadara. In Arabic it is said
"Qadartu ash-shay'a qadran (or qadaran) (I evaluated the thing)," if one knows
its quantity and other attributes.(Fath al-Baari by Ibn Hajar al-'Asqalani, 1/118, Cited in
Umar Al Ashqar, Divine Will and Predestination in the Light of Quran and Sunnah, p
33)

In Arabic, qadar means decree, judgement, ultimate
destiny. Taqdeer means to think about how to sort things out. (Al Qaamoos al-Muheet by Al-Fayroozabaadi, p. 591, Cited in Umar
Al Ashqar, Divine Will and Predestination in the Light of Quran and Sunnah, p 33)

In a technical sense, qadar means, "something of
which there was prior knowledge, one of the things which was written by the Pen when it
wrote down everything that was going to happen for the rest of eternity, when Allah
decreed the affairs of all His creation and what would happen before it happened. He knew
that these things would happen at certain times that were known to Him, and in specific
ways, and so things happen in the way that He has decreed. ('Aqeedat as-Safaareeni, 1/348, Cited in Umar Al Ashqar, Divine
Will and Predestination in the Light of Quran and Sunnah, p 33)

Ibn Hajar said in his definition: "What is meant
is that Allah knows how things will be and when they will happen, before He initiates
them. Then He creates that which He already knows will happen. Hence everything that
happens stems from His knowledge, power and will. (Fath al-Baari, 1/118, Cited in Umar Al Ashqar, Divine Will and
Predestination in the Light of Quran and Sunnah, p 33)

Ibn Hajar al-'Asqalani said that the word qadar
implies ability or power, and the object of that ability, which exists in the knowledge of
Allah. (Fath al-Baari, 11/477, Cited in Umar
Al Ashqar, Divine Will and Predestination in the Light of Quran and Sunnah, p 23)

Imam Ahmad was asked about qadar. He said "Qadar
is the power of Allah." (Majmoo' al-Fataawa
Shaykh al-Islam, 8/308, Cited in Umar Al Ashqar, Divine Will and
Predestination in the Light of Quran and Sunnah, p 24)

Ibn Abbas said: qadar is the essence of Tawheed.
Whoever worships Allah, the Almighty, Alone and believes in qadar has perfected his
Tawheed, but whoever worships Allah Alone but does not believe in qadar, destroys his
Tawheed by this disbelief. (Majmoo' al-Fataawa
Shaykh al-Islam, 8/258, Cited in Umar Al Ashqar, Divine Will and
Predestination in the Light of Quran and Sunnah, p 24)

Rational Evidence that Allah knew about the qadar
of His creation before He created it

The truth is that the existence of this universe and
every creature in it clearly indicates that Allah had knowledge of it before He created
it. "For it is impossible that He could create these things without knowing about
them, because He creates things by His Will, and will requires a preconceived idea about
the desired thing. This preconceived idea about the desired thing is knowledge of the
desired thing. So creation requires will and will requires knowledge, so creation requires
knowledge." (Sharh at-Tahaawiyah, p 148,
Cited in Umar Al Ashqar, Divine Will and Predestination in the Light of Quran and
Sunnah, p 42)

Moreover, "The created beings which exist in it
are made in a proper and perfect manner which implies that the One Who made them must have
knowledge of the, because such perfect work could not have been done by one who has no
knowledge" (Sharh at-Tahaawiyah, p 148,
Cited in Umar Al Ashqar, Divine Will and Predestination in the Light of Quran and
Sunnah, p 42)

The scholars also use a kind of analogy as evidence
for the knowledge of Allah: "Among His creation are those who have knowledge, and
knowledge is an attribute of perfection, so it is impossible for the Creator not to have
knowledge." This can be proven in two ways:

(1) It may be said: we know that the Creator is
inevitably more perfect than His creation, and that the One Who must exist (Allah) is more
perfect than one who may or may not exist (creature). If we assume that he former has
knowledge whilst the latter does not, then the One Who has knowledge is more perfect. If
the Creator does not have knowledge, this would imply that the one who may or may
not exist (creature) is more perfect than Him, and this is impossible.

(2) Every type of knowledge that the created being
has, comes from Allah, and it is impossible for the One Who created these beings with some
attributes of perfection to be devoid of perfection; He is more entitled to perfection
than they are, because whatever attributes of perfection the created beings are known to
have, the Creator is more entitled to them, and whatever imperfections the created beings
are above having, the Creator is more entitled to be above them and free of them. (Sharh at-Tahaawiyah, p 148, Cited in Umar Al Ashqar, Divine
Will and Predestination in the Light of Quran and Sunnah, p 42)

All of this evidence may be summed up in the verse

Surah 67:14

Should He not know what He created? And He is the Subtile, the Aware.

Benefits of believing in Qadar

1) Belief in Qadar is a Means of Ridding Oneself
of Shirk

The Magians (Zoroastrians) claimed that the Light was
the creator of good, and Darkness was the creator of evil.

Those among this ummah who claimed that Allah does
nto create the deeds of his slaves, or that He does not create the misguided deeds, are
claiming that there are creators other than Allah.

The one who believes in qadar affirms that this
universe and everything in it was created by One God; those who do not believe this imply
that there are other gods and lords besides Allah. (Umar Al Ashqar, Divine Will and Predestination in the Light of
Quran and Sunnah, p 139-140)

2) Adhering To The True Path During Both Times of
Ease and Times of Difficulty

Belief in qadar makes a person persist in his
adherence to the straigh path, so that he is not reckless at times of ease, and does not
fall into despair when calamity strikes, for he knows that everything good that happens to
him comes from Allah, and is not because of his intelligence or good planning. (Umar Al Ashqar, Divine Will and Predestination in the
Light of Quran and Sunnah, p 140)

Surah 16:53

And whatever favor is (bestowed) on you it is from Allah; then when evil afflicts you,
to Him do you cry for aid.

And when trials and tribulations befall a person, he knows
that this is happening by the decree of Allah, as a test from Him, so he does not panic or
despair, rather he seeks the reward of Allah and bears it with patience, and this faith
brings contentment and tranquility to the heart of the believer. (Umar Al Ashqar, Divine
Will and Predestination in the Light of Quran and Sunnah, p 142)

Surah 57:22-23

No evil befalls on the earth nor in your own souls, but it is in a book before We bring
it into existence; surely that is easy to Allah: So that you may not grieve for what has
escaped you, nor be exultant at what He has given you; and Allah does not love any
arrogant boaster:

And Allah Praises His slaves,

Surah 2: 156-157

Who, when a misfortune befalls them, say: Surely we are Allah's and to Him we shall
surely return. Those are they on whom are blessings and mercy from their Lord, and those
are the followers of the right course.

Links That Talk About Qadar

Besides writing a lengthy article. I have seen that
the issues have already been addressed and talked about. Here is a list of links that
people can visit to know more about the topic.

There was so much more I could have
talked about but I kept the article concise. If people are truly interested, I strongly
suggest that people buy this book http://onlineislamicstore.com/b7895.html. There are probably many
things that people might not understand about Qadar. So please feel free to email me and
ask me at b_zawadi@hotmail.com